JP3316609B2 - High gas pressure resistant cork stopper - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cork stopper formed by pressing cork grains made of cork bark, and more particularly to a compressed cork stopper capable of withstanding high gas pressure.

[0002]

2. Description of the Related Art Cork stoppers have a history of thousands of years as stoppers for beverage containers, and have been widely used as stoppers for high-grade drinks such as wine stoppers or whiskey stoppers even at present, when synthetic resins have been developed due to their excellent sealing properties. It is used. In such a cork stopper where the gas pressure of the contents is high, for example, a cork stopper for sealing sparkling wine, etc., in order to cope with this high gas pressure, a plurality of thin sheets of natural cork are laminated vertically and horizontally, respectively. A block material having enhanced gas sealing properties was formed by bonding, and this was punched or shaved to obtain a cork stopper having a desired shape.

[0003]

However, as described above, in a structure for forming a cork stopper by forming a block material having a good gas sealing property, steps such as plate forming, bonding, and punching are required. Because of the large number, it is not only unsuitable for mass production but also disadvantageous in terms of price, and there is a need for an immediate improvement of these disadvantages. In the case of a compressed cork stopper manufactured by coating the cork particles with an adhesive and pressing and heating and molding the same, when this is used as a stopper for high-pressure gas such as sparkling wine, it is formed by pressing. Since the central portion of the cork stopper tends to have a low density, there is always a risk that gas leaks from the central portion, and there is a disadvantage that a highly safe sealing performance cannot be obtained. Such drawbacks can be eliminated by increasing the density, but it is difficult to say that this is a good solution because the plugging force for removing the plug from the bottle mouth increases.
No. An object of the present invention is to provide a compressed cork stopper excellent in elastic sealing property by overcoming such disadvantages.

[0004]

SUMMARY OF THE INVENTION The present invention is directed to a high gas pressure resistant cork stopper in which cork particles are coated with an adhesive and pressed and squeezed.
Collapse using elastomeric compound as adhesive
When the stopper is formed, a silicon elastomer layer is integrally formed on the liquid contact portion on the surface of the cork stopper .

[0005]

According to the present invention, a silicone elastomer compound is used as an adhesive for coating cork particles, and the surface of the cork particles coated with the silicon elastomer compound is placed in a mold for plug molding so as to have a desired density. The silicone elastomer compound is cured by heating and filling it in stages to form a compressed cork stopper. At this time, a liquid contact surface is formed as shown in FIG. A portion of the C mold (3) is coated with a silicone elastomer compound in advance, and if necessary, this portion is pre-cured. After that, the cork particles coated with the silicone elastomer compound are filled and heated by pressurizing, so that the liquid contact surface is formed. Silicone elastomer layer (4) inside
Formed in two layers in addition to those formed in the
Thus, a high gas pressure resistant cork stopper having good gas sealing properties can be obtained.

[0006] The density of the high gas pressure resistant cork stopper to be pressed is 0.25 g / c in consideration of gas pressure resistance.
m3 to 0.40 g / cm3.
The range of 7 g / cm3 to 0.37 g / cm3 can be the most preferable density in terms of the plugging force. Further, the silicon elastomer layer (4) on the liquid contact surface may be thin. In this case, after the liquid contact surface forming C mold (3) is thinly coated with the silicone elastomer compound, the cork particles are formed into a mold, A ( 1) B (2) C (3) may be filled and pressurized and heated, but the silicone elastomer layer on the liquid contact surface (4)
In order to increase the thickness, the C mold (3) on the liquid contact surface is coated with the silicone elastomer compound, and after pre-curing, the cork particles coated with the silicon elastomer compound are filled and heated by pressing and heating to obtain the desired thickness on the liquid contact surface. Pressed corks with a silicone elastomer layer (4) can be produced economically.

[0007]

Examples of the present invention will be described below. Silicone elastomer compound A (hardness 60 degrees; KE-1950-60A manufactured by Shin-Etsu Chemical) 1.4 g Silicone elastomer compound B (hardness 60 degrees; KE-1950-60B manufactured by Shin-Etsu Chemical) 1.4 g Particle size 3.5 mm to 4.5 mm Cork granules having a diameter and a bulk specific gravity of 55 to 60 g / L 8.2 g The above-mentioned silicone elastomer compounds A and B are 20
1.4 g of each was weighed into a 0 cc beaker, and the A and B compounds were sufficiently mixed using a spatula.
After mixing, add 1/3 of the cork granules to this, stir and mix, further add and mix 1/3 of the cork granules, and finally add the remaining 1/3 and mix well with stirring to make the surface of the cork granules uniform Is coated with a silicone elastomer compound. This compound is used as a mold A (1), B shown in FIG.
(2) Using C (3), first coat a 1: 1 mixture of silicone elastomer compound on the surface of C type (3) to a desired thickness, then set C type (3) and B type (2). , B mold (2) is filled with cork particles coated with a silicone elastomer compound in a stepwise manner and pressurized, and then the upper mold A (1) is set and pressurized to mold A
Set pins (1), B (2) and C (3) (not shown)
Set together. This is heated and molded in a 150 ° C. gear oven for 75 minutes and then cooled, the A-type (1) and the B-type (2) are removed, and the compressed cork stopper is removed from the B-type (2) using a demolding jig. Then, a high gas pressure resistant cork stopper having a silicone elastomer layer (4) on the joint surface and excellent in elastic airtightness can be economically manufactured without material loss.

[0008]

According to the present invention, since the silicone elastomer compound and the silicone elastomer layer which are rich in water repellency and excellent in water resistance, heat resistance and chemical resistance are formed by filling between the cork particles and the liquid surface, a moderate density is obtained. It is possible to provide a cork stopper having an excellent aesthetic appearance and having an optimum plugging force with the above.

[0009]

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

[Description of Signs] 1 A type 2 B type 3 C type 4 Silicone elastomer layer

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B27N 3/02 B65D 39/00

Claims (1)

(57) [Claims] 1. A cork stopper formed by pulverizing a natural cork and coating the cork particles with an adhesive and press-molding the cork particle, wherein the cork stopper is formed by using a silicone elastomer compound made of an elastic material for the adhesive. A silicone elastomer layer is applied to the liquid-contact part on the surface of the cork stopper.
A high gas pressure resistant cork stopper characterized by being additionally added and integrally molded.